The advocacy group Patients not Patents [1] has been having a bit of fun with Wikitracker [2]...
,The first drug company caught messing with the Wikipedia was AstraZeneca. References to claims that Seroquel allegedly made teenagers “more likely to think about harming or killing themselves” were deleted by a user of a computer registered to the drug company [3], according to Times [4]....
Patients not Patents found that in July of 2007, a computer at Abbott Laboratories’ Chicago office was used to delete a reference to a Mayo Clinic study that revealed that patients taking the arthritis drug Humira faced triple the risk of developing certain kinds of cancers and twice the risk of developing serious infections. The study was published in the Journal of the American Medical Association in 2006.
The same computer was used to remove articles describing public interest groups’ attempt to have Abbott’s weight-loss drug Meridia banned after the drug was found to increase the risk of heart attack and stroke in some patients.
Conservatives call regulations on companies like these "burdensome"...
Links:
[1] http://www.patientsnotpatents.org/
[2] http://www.brandweeknrx.com/2007/08/abbott-caught-a.html
[3] http://en.wikipedia.org/w/index.php?diff=prev&oldid=144007397
[4] http://business.timesonline.co.uk/tol/business/industry_sectors/media/article2264150.ece